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相关概念视频

Routh-Hurwitz Criterion II01:19

Routh-Hurwitz Criterion II

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In the application of the Routh-Hurwitz criterion, two specific scenarios can arise that complicate stability analysis.
The first scenario occurs when a singular zero appears in the first column of the Routh table. This situation creates a division by zero issues. To resolve this, a small positive or negative number, denoted as epsilon (∈), is substituted for the zero. The stability analysis proceeds by assuming a sign for ∈. If ∈ is positive, any sign change in the first...
300
Introduction and Methods of Leveling01:26

Introduction and Methods of Leveling

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Leveling is a surveying procedure used to determine elevation differences between distant points. Elevation refers to the vertical distance above or below a reference datum, typically mean sea level (MSL). In the United States, elevations are often referenced to the mean sea level station at Father Point Rimouski along the St. Lawrence Seaway. To make the datum accessible, permanent markers are established throughout the region. These markers, called benchmarks, have known elevations. If the...
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Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving01:29

Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving

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Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
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Heuristics01:21

Heuristics

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Heuristics are problem-solving strategies that use mental shortcuts to simplify decision-making. Unlike algorithms, which must be followed precisely to achieve a correct result, heuristics offer a general problem-solving framework. They save time and energy but can sometimes lead to less rational decisions.
People often rely on heuristics when faced with an overload of information, limited time, low importance of the decision, limited information, or when a heuristic readily comes to mind. For...
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Routh-Hurwitz Criterion I01:15

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Consider an electrical power grid, where stability is essential to prevent blackouts. The Routh-Hurwitz criterion is a valuable tool for assessing system stability under varying load conditions or faults. By analyzing the closed-loop transfer function, the Routh-Hurwitz criterion helps determine whether the system remains stable.
To apply the Routh-Hurwitz criterion, a Routh table is constructed. The table's rows are labeled with powers of the complex frequency variable s, starting from the...
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一种高效的多层次图像值方法,基于改进的基于堆的优化器.

Essam H Houssein1, Gaber M Mohamed2, Ibrahim A Ibrahim2

  • 1Faculty of Computers and Information, Minia University, Minia, Egypt. essam.halim@mu.edu.eg.

Scientific reports
|June 5, 2023
PubMed
概括
此摘要是机器生成的。

一个改进的基于堆的优化器 (IHBO) 通过降低计算成本来增强多级值 (MTH) 图像分割. 对于精确的图像细分,IHBO在其他元启发算法上表现出卓越的性能.

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科学领域:

  • 计算机视觉 计算机视觉
  • 人工智能的人工智能
  • 图像处理 图像处理

背景情况:

  • 图像细分将图像像素分为类别进行对象分析.
  • 多级值 (MTH) 要求为有效的细分提供最佳值.
  • 像卡普尔和奥苏方法这样的现有方法对于MTH来说在计算上昂贵.

研究的目的:

  • 为了解决MTH图像分割的高计算成本.
  • 提高基于堆的优化器 (HBO) 的收率和本地搜索效率.
  • 为MTH问题引入一个改进的基于堆的优化器 (IHBO).

主要方法:

  • 通过将基于对立的学习与HBO集成,开发了一个改进的基于堆的优化器 (IHBO).
  • 应用IHBO到MTH图像细分,使用Otsu和Kapur方法作为目标函数.
  • 对七个元启发算法进行CEC'2020测试套件的IHBO性能评估.

主要成果:

  • 在健身价值方面,IHBO显著超过了基准算法.
  • 在结构相似性指数 (SSIM),特征相似性指数 (FSIM) 和峰值信号与噪声比率方面,IHBO取得了卓越的表现.
  • 拟议的IHBO方法证明了MTH图像细分的提高效率和准确性.

结论:

  • IHBO算法是MTH图像分割的高效和高效的方法.
  • IHBO克服了传统MTH技术的计算成本限制.
  • 在图像细分任务中,IHBO显示出对现有的元启发算法的优越性.